Multiple choice

Which ecological cycle is directly driven by sunlight?

  1. Nitrogen

  2. Phosphorus

  3. Hydrologic

  4. Sulphur

Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The hydrologic cycle, or water cycle, is directly driven by solar energy, which provides the heat necessary for evaporation and transpiration. While other cycles involve biological and geological processes, water evaporation is primarily solar-powered. Therefore, the hydrologic cycle is the correct choice among the given options.